PV sub-generator junction box, PV generator junction box, and PV inverter for a PV system, and PV system

摘要

A photovoltaic (PV) sub-generator junction box (1) for a PV system (100) comprises a plurality of electric terminals (11) for optionally connecting one respective PV string (2) of one or more serially connected PV modules (3). Said PV sub-generator junction box (1) further comprises a sub-generator line terminal (12) for connecting a PV sub-generator line (4) of a remote central PV inverter (5) or connecting a PV sub-generator line (4) of an inserted PV generator junction box (6). The PV sub-generator junction box (1) also comprises an electronic control unit (10) that is connected to a central control unit (7) of the PV inverter (5) in order to exchange data (DAT0). According to the invention, the PV sub-generator junction box (1) comprises a power line modem (8) for feeding and retrieving the data (DAT) via the PV sub-generator line (4).

主权项

1. A photovoltaic (PV) sub-generator junction box for a PV system, comprising:
a plurality of electrical terminals for connection to respective PV string lines of at least one series-connected PV module; and a sub-generator line terminal for connection to a remote central PV inverter; an electronic control unit connected for data communication to a central control unit within the remote central PV inverter for exchange of data; wherein the PV sub-generator line is configured to deliver power received from respective PV string lines to the remote central PV inverter; and a power line modem configured to transmit and receive the data over the PV sub-generator line that delivers power; wherein the electronic control unit includes at least one electrical output for activating at least one switching device of the PV sub-generator junction box, and wherein the data receivable from the central control unit within the PV inverter by the power line modem comprises corresponding control data.